METHOD OF WELDED SEAM THERMAL TREATMENT AND DEVICE TO THIS END Russian patent published in 2010 - IPC C21D11/00 

FIELD: process engineering.

SUBSTANCE: set of invention relates to thermal treatment. In compliance with proposed method, products with welded seams are rotated and heated. In rotation, welded seam temperature is measured with the help of photoelectric pyrometre the output signal of which is compared with preset value. Difference between said values is determined to adjust seam heating depending upon determined value. In measuring temperature, current temperature signal is compared with previous one to determined difference between signals and its sign, difference signal is integrated and sent for heat control. Heating element allows adjusting heating temperature. Housing has opening closed by transparent material and photoelectric pyrometre is arranged opposite said opening. Assembly to accommodate proposed device, incorporates product vertical drive. Proposed device is furnished with welded seam heating control unit with its input connected with photoelectric pyrometre and its output connected with heater.

EFFECT: higher quality.

3 cl, 3 dwg, 1 ex